Yu-Gi-Oh! World Championship Tournament 2004, known in Japan as Yu-Gi-Oh! Duel Monsters Expert 3, is a video game based on the Yu-Gi-Oh! franchise.

The game has been released on the Game Boy Advance.

In the game, the player can assemble three Decks and can play Duel Monsters against a variety of computer opponents.

The game features the first 1,138 cards released in Japan (201 spells, 109 traps, 55 fusion monsters, 16 ritual monsters, 224 effect monsters and 533 normal monsters). It is noteworthy that you can collect "Dark Magician" and "Polymerization" in two different artworks, counting as different cards.

Opponents

There are 28 opponents in the game. Each opponent has different skills and Decks revolving around a certain theme (Yugi Muto = Basic, Rare Hunter = Exodia, Yami Yugi = Ultimate, etc.).
There is no conversation, you just start duels right away.

Sadly the weaker opponents Decks are full of junk monsters that aren't worth battling like Winged Cleaver.
The stronger opposing Decks (Level Four and above) put up a higher callenge since they ignore card limitations.

Since many opponents don't use cards against opponents spells/traps the use of stalling cards like Gravity Bind can make winning a pretty easy task.

Trunk

The number of total cards shown in the top bar is sadly not the number of different cards collected so far. It really means the total number of all cards you have.
The other numbers in the sub categories only refer to the number of cards in your actually used deck.

You can sort cards (only ascending) by chosing sorting criterias one after another. The previous sortings are kept as far as possible. (i.e. sort by 1) name 2) DEF 3) ATK)

Sadly there is no useful sorting criteria for spells and traps beside "name".

For faster scrolling through the card list push the left/right-button.You wil jump to the next 4 cards. For even faster scrolling hold the B-button and press up/down.

You start the game with 120 random cards. The default Deck can be optimzed right away with other cards in your trunk in most cases.

Their are cards which are Limited or Semi-Limited. (for you but not for the opponents of higher level)

Receiving Cards

After winning a duel you can choose a booster pack containing 5 cards.

In most cases one of the cards is a (highlighted) rare card. There can be only 1 rare card per pack.
Since the AI wants you to receive all cards in the game most of the cards he offers are cards you haven't collected so far which makes it hard to collect 3 copies especially of the rare cards.

Semi Limited

Glitches

Card text

In both card text and card names, "Magician" has been replaced by "Spellian". This affects cards including "Dark Magician", "Magician of Black Chaos", and "Dark Magician Girl". This is likely as a result of a last-minute changing of "Magic" to "Spell" using a mass-text replacer on the ROM before release.

Card Effect

You are not asked if you want to activate a trap on an empty game state. So it is not possible to use Call of the Haunted during your opponents end phase i.e.

when Zombyra the Dark is removed from the field i.e. by the flip effect of a Cyber Jar it just destroyed, a replacement monster gets his ATK reduced by 200 (even if it is summoned in facedown DEF mode).

Smartness of AI

The AI...

shows signs of "knowing" face-down cards. i.e. he never attacks a set monster if it has higher DEF than his monsters ATK.

never attacks a monster with highest ATK on the field even if he has an equally strong monster and would be able to attack with other monsters afterwards.

uses Backup Soldier when its activation requirements are fulfilled even if he doesn't retrieve any monster from his graveyard at that time.

If a card effect would make one of the AI's monsters stronger than your highest-ATK monster, but the monster is naturally weaker than the latter, the AI will still play it in Defense Position. However, it will switch the monster to Attack Position at the next opportunity.